CodeForces 11B - Jumping Jack

练练脑袋的速度！

#include <iostream>#include <cstdio>#include <cmath>#include <cstdlib>#include <iomanip>#include <algorithm>#include <cctype>#include <stack>#include <queue>#include <string>#include <cstring>#include <iomanip>#include <set>#include <vector>#include <cstdio>#include <stack>#include <sstream>#include <cstring>#include <map>using namespace std;int main(){ int x,num=0,i=0; cin>>x; for(x=abs(x);num<x||num%2!=x%2;num+=i)    i++; cout<<i<<endl; return 0;}